Method of manufacturing type-wheels for printing-machines.



E. OGUMPA UGH. METHOD OF MANUFACTURING TYPE WHEELS FOR PRINT INGMACHINES. APPLICATION FILED SBPT.12, 191s.'

Patented June 16,1914. 7

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UNITED STATES PATENT OFFICE.

EDMUND OCUMPAUGH, OF ROCHESTER, NEW' YORK, ASSIGNOR TO DEFIANCE MACHINECOMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEXV YORK.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed September 12, 1913. Serial No. 789,443.

T0 at whom it may concern:

Be it known that I, EDMUND OCUMPAUGH, a citizen of the United States,and resident of Rochester, in the county of Monroe and State of NewYork, have invented certain new and useful Matters in the Method ofManufacturing Type-Wheels for Printing- Machines, of which the followingis a specification.

My invention relates to the method of manufacturing type wheels forprinting machines, and more particularly to the method of making andbending metal type plates to be secured to the outer faces of wheelsused in check writing and check protecting machines.

The type metal plates used in machines of this class are ordinarily ofthe electro-type construction, and are, therefore, made in a flat sheet,with the characters raised therefrom.

The surface of one side of these sheets whereas the rest of the sheet isof softer metal, it has been found in practice very difficult to bendthe sheets into cylindrical form without throwing the lines of printingmatter out of proper alinement one with the other, due to the fact thatsome of the lines of types are longer than others, and, therefore, addto the thickness of the metal at one side of the sheet. In order toovercome this difficulty, and to make it possible to readily bend themetal into a cylinder, and at the same time to maintain the alinementand spacing of the lines of printing matter on the plates, I fill in theshort lines of printing matter with meaningless characters, stars, and Ialso provide the edge of the plate with embossures either in the form ofcontinuous bands of raised metal or else in the form of series of raisedportions. By this means not only does the entire surface of the metaltend to bend with equal stretching of the outer and crushing of theinner surface, but this bending is so dominated by the embossures at theedges of the plate that whatever slight tendency toward warping occurs,due to the irregular distribution of printing characters, is overcome.

The process of carrying out my invention such as large dots orisillustrated in the accompanying drawings, in which Figure 1 shows aportion of a type plate havlng embossures in the form of series ofraised portions at each edge; Fig. 2 shows a portion of a type platehaving embossures in the form of raised bands at its edges; Fig. 3 showsthe type plate of Fig. 2 bent into a cylinder and secured to the surfaceof a typewheel; and Fig. a shows the type wheel in its final form, afterthe embossures have been cut away.

The type plate illustrated in Fig. 1 has a plurality of printingcharacters thereon, some of which form lines extending almost across theplate, while others form short lines extending less than half way acrossthe plate. The latter, or short lines, are filled out by means of rounddots (1), so that the thickness of the plate will be substantially thesame on both sides. At the extreme edges of this plate the rectangularembossures (2) are arranged in alinement with the lines of type, thepurpose of this being to cause the greater part of the bending of theplate to occur between the lines of type, so

that the actual surface of the type will be substantially flat. In Fig.2 this latter advantage is sacrificed by making the embossures (3) atthe sides of this plate in the form of continuous bands.

In carrying out my invention, the type plate of Fig. 1 or Fig. 2, whichhas been prepared by the usual electro-type method, is passed betweenrollers properly set to bend the plate into a cylinder of substantiallythe size of the wheel upon which the plate is to be secured. The platewith its auxiliary embossures is then placed upon the type wheel 1), andsecured thereto by means of a plurality of rivets (5), which may bespaced about the circumference of the wheel in any desired manner. Thewheel is then placed in a lathe, or special turning machine, and theembossures (2) or (3), as the case may be, are then cut away, producingthe type wheel of Fig. 4, on which only the characters remain whichactually come in contact with the paper during the printing process.

While I have described the method of carrying out my invention withparticular reference to the accompanying drawings, I do not Wish to beunduly limited thereto, many deviations from the particular structurebeing possible Without in any Way departing from the spirit or scope ofmy invention.

What I claim and wish to secure by Letters Patent is 1. The method offorming cylindrical type Wheels having long and short lines of typeconsisting in producing substantially equal thickness for all parts ofthe metal by the introduction of meaningless characters to fill outshort lines, bending the plate into a cylinder and securing it to thesurface of the type Wheel.

2. The method of manufacturing cylindrical type Wheels, Which consistsin forming fiat electro-types with thickened edges extending beyond theprinting faces thereof, bending the electro-types and their thickenededges into a cylinder, and thereafter removing the raised edges.

3. The method of forming cylindrical type Wheels, which consists indistributing characters substantially equally throughout the flatsurface of an electro-type, providing dominating embossures along eachedge of the plate, bending the plate into a cylinder, and thereafterremoving the embossed edges.

4. The method of forming curved printing plates which consists indistributing characters substantially equally throughout the flatsurface of an electro-type, providing dominating embossures along theedge of the printing plate, bending the plate and its embossed edgesinto a curve and thereafter removing the embossed edges.

Signed by me at Rochester, county of Monroe, and State of New York, inthe presence of two Witnesses.

EDMUN D OOUMPAUGH.

Witnesses:

E. C. GEoK, HENRY J. PLANT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

